vice president joe biden urged mayors to act now on gun control. >> oakland and california have these very strong gun-control laws, but i still have teenagers with ak-47's on the streets of oakland, because they can come in by mail. so we really have to have a national law that requires at least id checks and criminal background checks. >> reporter: quan is lobbying for the hiring of former los angeles police chief bratton in oakland. bratton, an outspoken proponent of the stop-and-frisk policy, has recently been a target of protests in oakland. >> i'm not here to defend every policy or everything chief bratton has done. but i do know this. that crime in los angeles went down. >> reporter: but that controversy may pale in comparison to the kind of gridlock that could take place. >> does it seem realistic at this point to think that could pass with such a divided congress? >> well, it has to go to the public. i think the more unified the public is on gun violence prevention, the more congress will act upon it. >> reporter: by law, the president has to be sworn in on january 20, so he w